Clariverdict/Index/Open Source AI Models/Llama 3.1 405B

Llama 3.1 405B

FreeOpen Source AI Models

Category:Open Source AI Models·Pricing:Free

Last Updated:N/ALast Verified:Aug 14, 2026Source:View source

Meta's flagship open-weights giant from 2024, now superseded by Llama 4 for new deployments.

Freshness 50%Aug 14, 20261 source

#Meta#Open Weights#405B Parameters#Reasoning Model

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Overview

Llama 3.1 405B was a milestone in open-weights artificial intelligence. With 405 billion parameters, it offered deep reasoning, mathematics capabilities, multi-lingual translation, and massive synthetic data generation. It is superseded by Llama 4 Maverick (Apr 2025) for new projects.

Features

Exceptional multi-stage logic and reasoning capabilities

Massive 128,000 token context window buffer

Configurable under open community licenses allowing custom commercial deployments

Excellent synthetic data generation and distillation keys

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Details

Primary Categoryopen-source

Billing TypeFree

Updates Logs0 releases

Verification

Official sourceLinked

Last verifiedAug 14, 2026

StatusVerified

Frequently asked questions

Is Llama 3.1 405B free?

Pricing model: Free. Entirely free weight files to download. Cloud API hosted costs depend on provider (e.g. Together AI).

What is Llama 3.1 405B best for?

Meta's flagship open-weights giant from 2024, now superseded by Llama 4 for new deployments.

What are alternatives to Llama 3.1 405B?

Documented alternatives in the Clariverdict catalog: Llama, Mistral, DeepSeek. Open each profile for verified specs, pricing, and sources.

When was Llama 3.1 405B last verified?

Clariverdict last verified this listing on 2026-08-14 against the official source at https://www.llama.com.